docstr: Test degree assortativity for a directed graph where the set of
  in/out degree does not equal the total degree.
docstr_tok: ["Test","degree","assortativity","for","a","directed","graph","where","the","set","of","in\/out","degree","does","not","equal","the","total","degree","."]
code: def test_degree_assortativity_directed2(self):
      """Test degree assortativity for a directed graph where the set of
      in/out degree does not equal the total degree."""
      r = nx.degree_assortativity_coefficient(self.D2)
      np.testing.assert_almost_equal(r, 0.14852, decimal=4)
  
imports: import pytest
  import networkx
  from networkx.algorithms.assortativity.correlation import attribute_ac
  from .base_test import BaseTestAttributeMixing, BaseTestDegreeMixing
label_desc: Use image node_id 4 for calling the TestDegreeMixingCorrelation obj's underlying member method code with example usage: obj.test_degree_assortativity_directed2() without return types